Because the apparent recessional speeds of galaxies and quasars at great distances are close to the speed
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Because the apparent recessional speeds of galaxies and quasars at great distances are close to the speed of light, the relativistic Doppler shift formula (Equation. 37 -31) must be used. The shift is reported as fractional red shift z = Δ λ /λ0.
(a) Show that, in terms of z, the recessional speed parameter β = v/c is given by β = z2 + 2z / z2 +2z +2
(b) A quasar detected in 1987 has z = 4.43. Calculate its speed parameter.
(c) Find the distance to the quasar, assuming that Hubble's law is valid to these distances.
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Related Book For
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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